#BB3742#BB3742

#BB3742 is a mid, vivid red. Relative luminance 0.137; OKLCH L 53.6% C 0.168 H 20.4°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#BB3742
RGB	rgb(187, 55, 66)
HSL	hsl(355, 55%, 47%)
HSV	hsv(355, 71%, 73%)
CMYK	cmyk(0%, 70.6%, 64.7%, 26.7%)
CIE-LAB	lab(43.79, 53.16, 24.55)
CIE-LCH	lch(43.79, 58.55, 24.79°)
OKLab	oklab(53.61% 0.1573 0.0585)
OKLCH	oklch(53.61% 0.168 20.4)
XYZ	xyz(22.8454, 13.6938, 6.5934)
Luminance	0.1369 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3742 #37BBB0

analogous

#BB3784 #BB3742 #BB6E37

triadic

#BB3742 #42BB37 #3742BB

tetradic

#BB3742 #84BB37 #37BBB0 #6E37BB

square

#BB3742 #84BB37 #37BBB0 #6E37BB

split-complementary

#BB3742 #37BB6E #3784BB

monochromatic

#5C1B21 #8C2931 #BB3742 #D05F69 #DE8E95

Accessibility & contrast

On white

5.62

#BB3742 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#BB3742 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3742

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3742	#FFFFFF	#000000	##FFFFFF
##BB3742	1.00	5.62	3.74	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5641

Deuteranopia (green-blind)

#7C723E

Tritanopia (blue-blind)

#CD0F3C

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3742;
/* rgb */ color: rgb(187, 55, 66);
/* oklch */ color: oklch(53.6% 0.168 20.4);

Tailwind

colors: {
  custom: {
    50: '#d77776',
    500: '#bb3742',
    950: '#000000',
  },
}

SCSS

$custom: #bb3742;
$custom-light: #d77776;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3742",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 66
  },
  "hsl": {
    "h": 355,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53606,
    "c": 0.16786,
    "h": 20.4
  },
  "luminance": 0.13691
}

Semantic roles & 50–950 ramp

primary

#BB3742

secondary

#85C9C3

accent

#DED24A

background

#FEF7F7

surface

#FCEEED

border

#D5C9C8

text

#160908

muted

#847B7B

Preview Lab

Preview with #BB3742

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →